It was serialized in Shogakukan's seinen manga magazine Big Comic Superior from March 2015 to June 2023, with its chapters collected in ten tankōbon volumes.

A ten-episode original net animation (ONA) series adaptation was produced by Liden Films and premiered in March 2022 on Netflix.

Written and illustrated by Mami Tsumura, Kotaro Lives Alone was serialized in Shogakukan's seinen manga magazine Big Comic Superior from March 13, 2015,[10] to June 9, 2023.

[11][12] Shogakukan collected its chapters in ten individual tankōbon volumes, released from December 28, 2015,[13] to August 30, 2023.

The series is animated by Liden Films and directed by Tomoe Makino, with story composition by Hiroshi Satо̄, character designs by Tomomi Kimura, and music composed by Yūya Mori.